Set sleep and wake times for your Mac
You can set your Mac to go to sleep after a specified duration of inactivity. You can also set your Mac to go to sleep and wake up at a specific time.
Specify sleep and wake settings for a desktop Mac
Note: Some of the options may not be available, depending on your Mac.
On your Mac, choose Apple menu
> System Preferences, then click Energy Saver.Do any of the following:
Set the amount of time your computer or display should wait before going to sleep: Drag the “Computer sleep” and “Display sleep” sliders, or the “Turn display off after” slider.
Keep your Mac from going to sleep automatically: Select “Prevent computer from sleeping automatically when the display is off.”
Put hard disks to sleep: Select “Put hard disks to sleep when possible.”
Keep your Mac turned on whenever power is available: Select “Start up automatically after a power failure.”
Allow your Mac to wake briefly so users can access shared services (if applicable): Select any of the available “Wake for…” options, for example, “Wake for network access.”
Specify sleep and wake settings for a portable Mac
Note: Some of the options may not be available, depending on your Mac.
On your Mac, choose Apple menu
> System Preferences, then click Energy Saver.Do any of the following:
Switch between graphics modes: Select “Automatic graphics switching” to switch between graphics modes automatically for better battery life.
Set sleep times for when you’re using your portable computer’s battery: Click Battery, then drag the “Computer sleep” and “Display sleep” sliders, or the “Turn display off after” slider.
Set sleep times for when you’re using your portable computer’s power adapter: Click Power Adapter, then drag the “Computer sleep” and “Display sleep” sliders, or the “Turn display off after” slider.
Keep your Mac from going to sleep automatically: Select “Prevent computer from sleeping automatically when the display is off” in the Power Adapter pane.
Put hard disks to sleep: Select the “Put hard disks to sleep when possible” option in the Battery or Power Adapter pane.
Keep your display dimmed while using your battery: Click Battery, then select “Slightly dim the display while on battery power.”
Update your system while it’s asleep: Select “Enable Power Nap while on battery power” in the Battery pane, and “Enable Power Nap while plugged in to a power adapter” in the Power Adapter pane.
Allow your Mac to wake briefly so users can access shared services (if applicable): Select any of the available “Wake for…” options in the Power Adapter pane, for example, “Wake for network access.”
You can also schedule a time for your Mac to start up, shut down, or sleep.